Solvothermal synthesis of Fe-C codoped TiO2 nanoparticles for visible-light photocatalytic removal of emerging organic contaminants in water

被引：56
作者：
Wang, Xiaoping [1 ]
Tang, Yuxin [2 ]
Leiw, Ming-Yian [3 ]
Lim, Teik-Thye [1 ]
机构：
[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Div Environm & Water Resources Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
来源：
APPLIED CATALYSIS A-GENERAL | 2011年 / 409卷
基金：
新加坡国家研究基金会;
关键词：
Fe-C codoping; Carbonate species; Photocatalytic degradation; Toxicity; TITANIUM-DIOXIDE; DOPED TIO2; SOLAR LIGHT; DEGRADATION; CARBON; PHOTODEGRADATION; 4-CHLOROPHENOL; NANO-TIO2; MECHANISM; OXIDATION;
D O I：
10.1016/j.apcata.2011.10.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Anatase Fe/C-TiO2 nanoparticles were synthesized by a facile solvothermal method. The results showed that Fe was incorporated into TiO2 lattice by substituting Ti4+, while C was present in the form of carbonate species on the surface. Fe3+ dopants could introduce a new dopant energy level into TiO2 band gap while the carbonate species served as photosensitizer. Both of them were responsible for the visible-light photocatalytic activity of the Fe/C-TiO2. In addition, the presence of Fe dopants and carbonate species could favor the formation of surface hydroxyl groups, and inhibit recombination of photo-generated electrons and holes. Moreover, the Fe/C-TiO2 displayed larger surface area than C-TiO2 and Fe-TiO2. The synergistic effects of Fe and C codoping into TiO2 resulted in improved photocatalytic activities of Fe/C-TiO2 for degradation of bisphenol A (BPA) and clofibric acid (CA) as compared to C-TiO2. Fe-TiO2 and P25 under visible light and simulated solar light irradiation. The toxicities of BPA solutions gradually decreased throughout BPA mineralization. The photocatalytic activity of the Fe/C-TiO2 was maintained effectively even after several cyclic experiments. Finally, the possible photocatalytic mechanisms over the Fe/C-TiO2 under visible light and UV irradiation were proposed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：257 / 266
页数：10
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